'\" te
.\" Copyright (c) 2003, Sun Microsystems, Inc. All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH LGRP_VERSION 3LGRP "Apr 16, 2003"
.SH NAME
lgrp_version \- coordinate library and application versions
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag \&.\|.\|.\fR ] \fIfile\fR\&.\|.\|. \fB-llgrp\fR [ \fIlibrary \&.\|.\|.\fR ]
#include <sys/lgrp_user.h>

\fBint\fR \fBlgrp_version\fR(\fBconst int\fR \fIversion\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBlgrp_version()\fR function takes an interface version number,
\fIversion\fR, as an argument and returns an lgroup interface version.  The
\fIversion\fR argument should be the value of \fBLGRP_VER_CURRENT\fR bound to
the application when it was compiled or \fBLGRP_VER_NONE\fR to find out the
current lgroup interface version on the running system.
.SH RETURN VALUES
.sp
.LP
If \fIversion\fR is still supported by the implementation, then
\fBlgrp_version()\fR returns the requested version. If \fBLGRP_VER_NONE\fR is
returned, the implementation cannot support the requested version. The
application should be recompiled and might require further changes.
.sp
.LP
If \fIversion\fR is \fBLGRP_VER_NONE\fR, \fBlgrp_version()\fR returns the
current version of the library.
.SH EXAMPLES
.LP
\fBExample 1 \fRTest whether the version of the interface used by the caller is
supported.
.sp
.LP
The following example tests whether the version of the interface used by the
caller is supported:

.sp
.in +2
.nf
#include <sys/lgrp_user.h>

if (lgrp_version(LGRP_VER_CURRENT) != LGRP_VER_CURRENT) {
    fprintf(stderr, "Built with unsupported lgroup interface %d\en",
        LGRP_VER_CURRENT);
    exit (1);
}
.fi
.in -2

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Evolving
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR lgrp_init (3LGRP),
.BR liblgrp (3LIB),
.BR attributes (7)
